<template>
    <div>
        <div class="shopcart">
            <div class="content">
                <div class="content-left" @click="toggleShow">
                    <div class="logo-wrapper">
                        <div class="logo" :class="{highlight:totalCount}">
                            <i class="iconfont icon-gouwuche" :class="{highlight:totalCount}"></i>
                        </div>
                        <div class="num" v-if="totalCount">{{totalCount}}</div>
                    </div>
                    <div class="price" :class="{highlight:totalCount}">￥{{totalPrice}}</div>
                    <div class="desc">另需配送费￥{{info.deliveryPrice}} 元</div>
                </div>
                <div class="content-right">
                    <div class="pay" :class="payClass">
                        {{payText}}
                    </div>
                </div>
            </div>
            <transition name="move">
            <div class="shopcart-list" v-show="listShow">
                <div class="list-header">
                    <h1 class="title">购物车</h1>
                    <span class="empty" @click="clearCart">清空</span>
                </div>
                <div class="list-content">
                    <ul>
                        <li class="food" v-for="(food,index) in cartFoods" :key="index">
                            <span class="name">{{food.name}}</span>
                            <div class="price"><span>￥{{food.price}}</span></div>
                            <div class="cartcontrol-wrapper">
                                <CartControl :food="food"/>
                            </div>
                        </li>
                    </ul>
                </div>
            </div>
            </transition>
        </div>
        <transition name="fade">
        <div class="list-mask" v-show="listShow" @click="toggleShow"></div>
        </transition>
    </div>
</template>

<script>
    import {mapState, mapGetters} from 'vuex'
    import CartControl from "../CartControl/CartControl";
    import BScroll from 'better-scroll';
    import {MessageBox} from 'mint-ui'

    export default {
        name: "ShopCart",
        data() {
            return {
                isShow: false
            }
        },
        components: {CartControl},
        computed: {
            ...mapState(['cartFoods', 'info']),
            ...mapGetters(['totalCount', 'totalPrice']),
            payClass() {
                const {totalPrice} = this
                const {minPrice} = this.info
                return totalPrice >= minPrice ? 'enough' : 'not-enough'
            },
            payText() {
                const {totalPrice} = this
                const {minPrice} = this.info
                if (totalPrice === 0) {
                    return `￥${minPrice}元起送`
                } else if (totalPrice < minPrice) {
                    return `还差￥${minPrice - totalPrice}元起送`
                } else {
                    return '去结算'
                }
            },
            listShow() {
                if (this.totalCount == 0) {
                    return false
                }
                if (this.isShow){
                    this.$nextTick(()=>{
                        //单例  防止多次创建实例对象
                        if (!this.scroll){
                            this.scroll=new BScroll('.list-content',{
                                click:true
                            })
                        }else {
                            this.scroll.refresh() //滚动条刷新，重新统计内容高度
                        }

                    })
                }
                return this.isShow
            }
        },
        watch: {
            listShow() {
                if (this.totalCount == 0) {
                    this.isShow = false
                }
            }
        },
        methods: {
            toggleShow() {
                if (this.totalCount > 0) {
                    this.isShow = !this.isShow
                }
            },
            clearCart(){
                MessageBox.confirm('确定清空购物车吗？').then(action => {
                    this.$store.dispatch('clearCart')
                },()=>{});
            }
        }
    }
</script>

<style lang="stylus" scoped>
    @import "../../common/stylus/mixins.styl"

    .shopcart
        position fixed
        left 0
        bottom 0
        z-index 50
        width 100%
        height 48px

        .content
            display flex
            background #141d27
            font-size 0
            color rgba(255, 255, 255, 0.4)

            .content-left
                flex 1

                .logo-wrapper
                    display inline-block
                    vertical-align top
                    position relative
                    top -10px
                    margin 0 12px
                    padding 6px
                    width 56px
                    height 56px
                    box-sizing border-box
                    border-radius 50%
                    background #141d27

                    .logo
                        width 100%
                        height 100%
                        border-radius 50%
                        text-align center
                        background #2b343c

                        &.highlight
                            background limegreen

                        .icon-gouwuche
                            line-height 44px
                            font-size 28px
                            color #80858a

                            &.highlight
                                color #fff

                    .num
                        position absolute
                        top 0
                        right 0
                        width 24px
                        height 16px
                        line-height 16px
                        text-align center
                        border-radius 16px
                        font-size 9px
                        font-weight 700
                        color #ffffff
                        background rgb(240, 20, 20)
                        box-shadow 0 4px 8px 0 rgba(0, 0, 0, 0.4)

                .price
                    display inline-block
                    vertical-align top
                    margin-top 5px
                    line-height 24px
                    padding-right 12px
                    box-sizing border-box
                    font-size 16px
                    font-weight 700
                    color #fff

                    &.highlight
                        color #fff

                .desc
                    display inline-block
                    vertical-align bottom
                    margin-bottom 15px
                    margin-left -45px
                    font-size 10px

            .content-right
                flex 0 0 105px
                width 105px

                .pay
                    height 48px
                    line-height 48px
                    text-align center
                    font-size 12px
                    font-weight 700
                    color #fff

                    &.not-enough
                        background #2b333b

                    &.enough
                        background limegreen
                        color #fff

        .ball-container
            .ball
                position fixed
                left 32px
                bottom 22px
                z-index 200
                transition all 0.4s cubic-bezier(0.49, -0.29, 0.75, 0.41)

                .inner
                    width 16px
                    height 16px
                    border-radius 50%
                    background $green
                    transition all 0.4s linear

        .shopcart-list
            position absolute
            left 0
            top 0
            z-index -1
            width 100%
            transform translateY(-100%)

            &.move-enter-active, &.move-leave-active
                transition transform .2s

            &.move-enter, &.move-leave-to
                transform translateY(0)

            .list-header
                height 40px
                line-height 40px
                padding 0 18px
                background #f3f5f7
                border-bottom 1px solid rgba(7, 17, 27, 0.1)

                .title
                    float left
                    font-size 14px
                    color rgb(7, 17, 27)

                .empty
                    float right
                    font-size 12px
                    color rgb(0, 160, 220)

            .list-content
                padding 0 18px
                max-height 217px
                overflow hidden
                background #fff

                .food
                    position relative
                    padding 12px 0
                    box-sizing border-box
                    bottom-border-1px(rgba(7, 17, 27, 0.1))

                    .name
                        line-height 24px
                        font-size 14px
                        color rgb(7, 17, 27)

                    .price
                        position absolute
                        right 90px
                        bottom 12px
                        line-height 24px
                        font-size 14px
                        font-weight 700
                        color rgb(240, 20, 20)

                    .cartcontrol-wrapper
                        position absolute
                        right 0
                        bottom 6px

    .list-mask
        position fixed
        top 0
        left 0
        width 100%
        height 100%
        z-index 40
        opacity 1
        background rgba(7, 17, 27, 0.6)

        &.fade-enter-active, &.fade-leave-active
            transition all 0.4s

        &.fade-enter, &.fade-leave-to
            opacity 0
            background rgba(7, 17, 27, 0)
</style>